How To Construct A Valley On A Pitched Roof

Draw a diagonal line between 9 feet the run of the main roof on the tongue of the square and 7 feet 6 inches the secondary roof run on the blade.

How to construct a valley on a pitched roof.

Soup to nuts riley shows the proper way of installing a valley on a roof. Part 3 of the four part guide to roof construction covers pitched roof detail. Unlike the cut roof method this method does not have a carpenter onsite creating pieces to be placed together on a roof. The hip and valley factor varies according to the slope of the roof as shown in the table below.

Soup to nuts riley shows the proper way of installing a valley on a roof. Of run for the valley rafter to rise the same distance that the common rafters rise in 12 in. Another pitched roof construction manner is the truss roof method. Therefore the pitch of the valley rafter is 12 in 17.

Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings. This gives the angle of the hip rafter. In a hip roof with equal pitches the unit run of a hip or valley rafter is 17 inches for every 12 inches of run in the main roof. The heel height overhang and ridge and fascia boards for both roofs will be the same.

To get the most out of it is helpful to also read parts 1 and 2. How to tie a additions roof to existing roof roof additions to existing roofs how to construct a roof from an exsisting shead how to change a roof line how to attach a deck roof to existing roof how to add a roof over porch attache porch roof on house attach shed roof to house adding a roof to screened in porch adding a roof to existing. Valley roof the valley roof option is used to calculate valleys for 90 degree intersecting roofs with equal slopes and wall plates at the same height. Divide the rise by the run the run is 12.

To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. The run of the valley rafter is longer than the run of the common rafters so it takes 17 in. This type of construction involves the use of factory made frames called tresses each of these trusses includes combining the joist. Unit run of the hip.

The blind valley roof can be used to calculate valleys for roofs with unequal slopes. At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing.